REPLAY: Fox News Republican presidential debate in Detroit

Here we go. Joining us on the live blog will be the Free Press' Kathy Gray, Todd Spangler, Nancy Kaffer and Brian Dickerson. Along with debate experts Aaron Kall at the University of Michigan and Kelly Young at Wayne State University.

And finally, Florida Sen. Marco Rubio said if anyone deserves personal attacks in the race, it’s Trump because of all the insults he’s hurled.

Trump’s response: “He hit my hands,” he said, referring to Rubio’s comments about Trump having small hands and how that could relate to the size of other body parts. “I guarantee you, there’s not problem with that,” Trump said.